A Symptoms - Data Link Communications
SYMPTOMS - DATA LINK COMMUNICATIONSIMPORTANT: The following steps must be completed before using the symptom tables:
1. Perform the Diagnostic System Check for the subsystem exhibiting the symptoms. The subsystem diagnostic system check will identify where to begin diagnosis of the data link communication system.
2. Review the system operation in order to familiarize yourself with the system functions.
Visual/Physical Inspection
- Inspect for aftermarket devices that could affect the operation of the serial data communications systems.
- Inspect the easily accessible systems or visible system components for obvious damage or conditions that could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Class 2 Device